# 作者：宋安康
# 开发时间：2023/5/21 16:55
list1 = [10, 30, "hello", "world"]
print(10 in list1)
print(10 not in list1)
print(100 in list1)
print(100 not in list1)

print("--------------------------")
"""遍历列表"""
for item in list1:
    print(item, end="\t")
